Four is of two.
The field research will take Joan and Paul about five months; it will be a long time _____ we meet them again.
Driving a car is not as difficult as you imagine, if you ____________ the rules.
Our team was ahead during the first half, but we _________ in the last ten minutes.
Xiamen is ___________ most beautiful coast city and I believe I will come for__________ second time.
The sports meet, originally due to be held last Friday, was finally ___________ because of the bad weather.